After I became a Widow

My husband Ross died 2 years ago last month and I was left with 2 children 4 & 2 to raise by myself. I'm June 27 and I married Ross against my family's wishes and they told me I wasn't part of the family anymore. Ross only had an older brother David 32 single and worked his own little farm in the midwest. Ross and David had inherited money and David bought a run-down farm and worked hard and made it a lot better. Ross had bought a business and after a couple of years it was failing and then he got ill and passed away. The business failed and we lost everything and not being able to return to my family I contacted David and he sent money for me and the children to join him on his farm. David is 6'4" tall, lean and very fit, he wasn't in any type of relationship at the time and I and the children had the 2 bedroom house to ourselves as David moved into an old shed he called a bunkhouse. He made sure we had everything we needed and I cooked all the meals for us all. David is a quiet person not into small talk and starts works at 5 am and finishes at 8 pm most days. He got me an old car for my use, it wasn't flash but it runs great. After six or so months I started to feel sorry for David as he didn't go out and had no social life at all. My oldest child Kathy turned 5 and had said she wanted a pony and I told her I couldn't afford a pony and David got her a pony from an animal shelter and Kathy calls it Bobby, David made a horse stall in the barn for it. He would spend his little spare time leading the horse around the barn with Kathy and Ross jr on it's back. He never complained about anything and if something went wrong he would fix it or find another way to complete whatever he was doing. I then decided to reward David and as the only money I had came from him, I decided I would give myself to him. I walked in on him in the shower last month in only my bathrobe and removed it and joined a very shocked David in the shower. I had to start seduction and kissed him and played with his cock and it soon got hard and I went down on a still shocked David. I climb onto him and he finally started to respond and we had sex in the shower and after in my bed. After several fucks, I told him he should sleep with me every night and he now sleeps with. I'm not on any protection and aim to have a baby for David and have told him so. He hasn't said anything against it.